I lost on time even though I had played

[Groin]

This thread may interest you

The timer should be counted on the client not the server

When you play on Asian servers like Tygem, it’s safe to play at 9.9 seconds in the last 10 seconds because the countdown is done on the client. There is still lag between the client and the server, so sometimes the opponent’s move will show after the countdown has finished, but you almost never have to worry about losing by timeout due to lag. In the current OGS system where the timer is counted from the server, you have to calculate yourself the latency between you and the server, and this bas…

In short, it’s not a bug.
It’s OGS choice to not use time from the client because of risks of cheating.